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Urinary retention, also known as ischuria, is an inability to completely empty the bladder. It is a common complication of benign prostatic hyperplasia (BPH), though it can also be caused by: * Nerve dysfunction * Tethered spinal cord syndrome * Constipation * Infection * Medications (including anticholinergics, antidepressants, COX-2 inhibitors, amphetamines, and opioids) Diagnosis and treatment may require a catheter or prostatic stent. == Signs and symptoms == Urinary retention is characterised by poor urinary stream with intermittent flow, straining, a sense of incomplete voiding, and hesitancy (a delay between trying to urinate and the flow actually beginning). As the bladder remains full, it may lead to incontinence, nocturia (need to urinate at night), and high frequency. Acute retention, causing complete anuria, is a medical emergency, as the bladder can stretch to an enormous size, and possibly tear if not dealt with quickly. If the bladder distends enough, it becomes painful. In such a case, there may be suprapubic constant, dull, pain. The increase in bladder pressure can also prevent urine from entering the ureters or even cause urine to pass back up the ureters and get into the kidneys, causing hydronephrosis, and possibly pyonephrosis, kidney failure, and sepsis. A person should go straight to an emergency department or A&E service as soon as possible if unable to urinate with a painfully full bladder. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Urinary retention」の詳細全文を読む スポンサード リンク
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